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fft float to int for reducing size and defining busy state detection area in correlation with mode bandwidth

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DJ2LS 2022-11-17 21:58:17 +01:00
parent cd9b8e5173
commit 0cafb600b3
1 changed files with 26 additions and 4 deletions
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30
tnc/modem.py
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@ -884,6 +884,30 @@ class RF:
static.AUDIO_RMS = int(np.sqrt(np.mean(d ** 2)))
rms_counter = 0
# Convert data to int to decrease size
dfft = dfft.astype(int)
# Create list of dfft for later pushing to static.FFT
dfftlist = dfft.tolist()
# Reduce area where the busy detection is enabled
# We want to have this in correlation with mode bandwidth
# TODO: This is not correctly and needs to be checked for correct maths
# dfftlist[0:1] = 10,15Hz
# Bandwidth[Hz] / 10,15
# narrowband = 563Hz = 56
# wideband = 1700Hz = 167
# 1500Hz = 148
# 2700Hz = 266
# 3200Hz = 315
# define the area, we are detecting busy state
if static.LOW_BANDWIDTH_MODE:
dfft = dfft[120:176]
else:
dfft = dfft[65:231]
# Check for signals higher than average by checking for "100"
# If we have a signal, increment our channel_busy delay counter
# so we have a smoother state toggle
@ -899,11 +923,9 @@ class RF:
if channel_busy_delay == 0:
static.CHANNEL_BUSY = False
# Round data to decrease size
dfft = np.around(dfft, 0)
dfftlist = dfft.tolist()
static.FFT = dfftlist[:320] # 320 --> bandwidth 3000
static.FFT = dfftlist[:315] # 315 --> bandwidth 3200
except Exception as err:
self.log.error(f"[MDM] calculate_fft: Exception: {err}")
self.log.debug("[MDM] Setting fft=0")